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09-21-2007, 08:37 AM   #1
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zoom 400-600mm f8

Does anyone have any experience with the pentax 400-600mm f8-12 reflex lens?

09-21-2007, 08:48 AM   #2
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From my experience so far, mirror zooms are fun to use, but they are in no way a replacement for faster regular primes.

The following things render the 400-600mm useless for true nature and tele photography:
-The lack of a tripod mount
-The slow aperture
-Lack of AF, hard to focus w/o shaking your camera or tripod

I've been enjoying my FA* 300mm F2.8 as my primary ultra-tele lens, but if you're looking for a cost-effective tele solution, check out the A 400mm F5.6 or the A* 200mm F2.8. Both are very sharp!

Here's a thread with a few sample photos from the mirror lens:

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